Properties of sulfation supported V/Ti denitration catalyst

doi:10.3969/j.issn.0438-1157.2013.04.018

CIESC Journal ›› 2013, Vol. 64 ›› Issue (4): 1249-1255.DOI: 10.3969/j.issn.0438-1157.2013.04.018

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Properties of sulfation supported V/Ti denitration catalyst

LI Junjie^1,2, MU Yang^1,3, YANG Juan¹, YU Jian¹, DUAN Zhengkang², XU Guangwen¹, XIONG Beichen⁴

1. State Key Laboratory of Multiphase Complex System, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
2. Chemical Engineering Institute, Xiangtan University, Xiangtan 411105, Hunan, China;
3. School of Chemical Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, Liaoning, China;
4. Beijing National Day School, Beijing 100039, China

Received:2012-04-05 Revised:2012-11-29 Online:2013-04-05 Published:2013-04-05
Supported by:
supported by the High-tech Research and Development Program of China(2010AA065004).

负载型钒钛脱硝催化剂酸化处理与性能

李俊杰^1,2, 牟洋^1,3, 杨娟¹, 余剑¹, 段正康², 许光文¹, 熊北辰⁴

1. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京 100190;
2. 湘潭大学化工学院,湖南湘潭 411105;
3. 沈阳化工大学化学工程学院,辽宁沈阳 110142;
4. 北京十一学校,北京100170

通讯作者: 余剑,许光文
作者简介:李俊杰(1986—),男,硕士研究生。
基金资助:
中国科学院国际合作重点项目(0829011198); 国家高技术研究发展计划项目(2010AA065004)。

Abstract

Abstract: A series of V₂O₅-WO₃-TiO₂/SO₄^2- catalysts were prepared with the impregnation method using nano-TiO₂ support sulfated according to three different orders of sulfating TiO₂ support and with different acid amounts.Characterization of the catalysts with XRD, BET, FT-IR and TG-DTG showed that sulfating the catalyst support decreased the specific surface area of the resulting catalyst but did not vary its crystal form.Sulfation caused as well strong interactions between WO₃ and the sulfate of the loaded active component.Temperature-programmed activity tests demonstrated further that sulfation increased catalytic activity by increasing the acidity of the catalyst at 120—400℃.This was confirmed also with NH₃-TPD for the prepared V/Ti denitration catalysts.

Key words: denitration catalyst, V₂O₅-WO₃-TiO₂, selective catalytic reduction, acidification

摘要： 以商业TiO₂为载体,采用浸渍法制备了V₂O₅-WO₃-TiO₂/SO₄^2-催化剂,考察了硫酸酸化载体TiO₂的顺序及硫酸酸化量对氨气选择性催化还原NO活性的影响,采用XRD、BET、FT-IR、TG-DTA、TPD等手段对催化剂进行了表征。BET表征结果表明,随着酸化处理的用酸量增大,催化剂表面积降低;但FT-IR、TG结果表明,增大酸化处理用硫酸量提高了硫酸根与钨之间的电子交互作用。程序升温的活性测试结果表明,硫酸酸化处理对催化剂活性具有促进作用,结合NH₃-TPD表征证实了具有酸化处理程序制备的催化剂可以增强表面酸性位,从而使催化剂具有高活性。

关键词: 脱硝催化剂, V₂O₅-WO₃-TiO₂, 选择性催化还原, 酸化

CLC Number:

TQ426.6

LI Junjie, MU Yang, YANG Juan, YU Jian, DUAN Zhengkang, XU Guangwen, XIONG Beichen. Properties of sulfation supported V/Ti denitration catalyst[J]. CIESC Journal, 2013, 64(4): 1249-1255.

李俊杰, 牟洋, 杨娟, 余剑, 段正康, 许光文, 熊北辰. 负载型钒钛脱硝催化剂酸化处理与性能[J]. 化工学报, 2013, 64(4): 1249-1255.

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Properties of sulfation supported V/Ti denitration catalyst

负载型钒钛脱硝催化剂酸化处理与性能

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